As a result of the accident, the U.S. Federal Aviation Administration will mandate that a ground proximity warning system be installed on every turbine- and turbojet-engined airplane operated in the United States.

About 40 airplanes currently operated by United States carriers are affected, the F.A.A. said.

For example, regardless of the recovery actions taken by the pilot (NASA Standard or otherwise), there is no guarantee that spin recovery can be effected beyond the first turn in a spin in an airplane being operated in the Normal category.

The airplane, operated by the courier company DHL, was hit by one or two surface-to-air missiles just after taking off from the main airport in Baghdad, the military said.

In November 2003, a missile struck an airplane operated by global shipment company DHL as it lifted off from a Baghdad airport.

He then talked his way onto a rickety DeHavilland Twin Otter, a 30-year-old twin-engine 16-seat airplane operated by Royal Tongan Airlines, rather than continue by sea.

On April 3, 2008, an airplane operated by Blue Wing Airlines crashed upon landing at Lawa Antino Airport near Benzdorp in which 19 people were killed.

The airplane, operated by a university aviation training program, was blown off of the runway by high winds.

Today's rule [January 16, 2007] establishes regulations governing the design, operation and maintenance of certain airplanes operated on flights that fly long distances from an adequate airport.

The fatal crash of the Valujet DC-9 near Miami on Saturday has set off an unusual public debate within the Transportation Department over the safety of airplanes operated by Valujet and the other low-cost airlines that have seized a share of the market over the past decade.